My question is. I have a 30 gal. Tank sitting around doing nothing. I wanted to make this into a refugium. I have a 75 gal. tank and I just need opinions on how to construct it. I am trying to go to a natural filtration set-up. I have an aqua clear 150 wet/ dry setup now. I have the lighting already to set it up with. I just want to know how to build it to add a skimmer and other things. If you coul refer me to a site that shows the construction that would be helpful. Or show and tell your ideas. Thanks. The tank is a typical 30.